Mizunami, Gifu Pref., Nov. 27 (Jiji Press)–Central Japan Railway Co. <9022>, or JR Tokai, has unveiled the inside of a tunnel under construction in Gifu Prefecture, central Japan, for use as part of its magnetic levitation ultrahigh-speed train line, scheduled to go into service in 2027.
A section of the Hiyoshi tunnel that is currently being drilled was shown to reporters on Tuesday. It was the first time for JR Tokai to unveil the inside of a tunnel to be used for the Chuo Shinkansen Line.
The mountainous construction zone of Minamigaito in the city of Mizunami, Gifu, is 7.4 kilometers long and 14 meters wide.
The construction of the tunnel started in December 2016 and the drilling work began in October last year.
Roughly 890 meters of the 8-meter high tunnel had been excavated as of Tuesday, with workers burrowing through at a pace of some 6 meters per day. The inner wall of the tunnel, lit by lights, was coated with concrete.
Two maglev train lines in both directions will run through the tunnel.
At the construction site, a 2-kilometer-long conveyor belt has been used to carry dirt from the drilling process out of the tunnel. The site is the only one among the construction sites for the maglev line that has a conveyor belt.
By using the equipment, “we can reduce environmental burdens, noise and vibrations caused by the dirt transportation work, compared with use of trucks,” said Satoru Kato, a JR Tokai official.